Rob:
One ounce of prevention is worth more than a pound of cure! Teach your daughter's self-protection skills, or enroll them in a self-protection course. Your intentions are good, but some bad consequences can follow. MANY times, the adrenalin dump that a person experiences as they are being attacked freezes the person. Furthermore, if what you teach your daughters is not truly effective the first time, the result (VERY COMMON) is an enraged attacker who ends up hurting the victim far more than would have otherwise been the case. Unless self-defense skills are actively practiced, the skills are typically not able to be employed when they are needed.